Contoh event di java

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;


public class event extends JFrame implements ActionListener  {

    private JLabel label1;
    private JButton button1;
    private JFrame frame1;
   
public event(){
    frame1 = new JFrame();
    frame1.setLayout(new FlowLayout());
    frame1.setSize(250, 250);
   
    button1 = new JButton("click");
    frame1.add(button1);
    button1.addActionListener(this);
    frame1.setVisible(true);
}

public static void main(String [] agrs){
    event e = new event();
    e.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   
}
public void actionPerformed(ActionEvent arg0) {
JOptionPane.showMessageDialog(null, "sukses");   
}
}

 jika diklik tombol click akan ada aksi yang akan muncul seperti gambar dibawah ini.